I rebuilded this model because there are a lot of internal edges and surfaces and errors in original STLs. Made in Kompas-3D-v21: m3d, stp, stl included.
I removed the camera pad because it comes with the camera (and the labels on the sides, this is a great place for dust I think). Camera pad can be screwed (two screws required) in two positions - 0 degrees and 90 degrees. I modified the shape of the stiffener (it is possible to install a camera with a connected USB cable now). I attached an aluminum strip on the top of mount for rigidity, but it is not necessary..

Slice and print with Cura and UM2+.
PLA, 0.4mm nozzle, 0.15mm layer, 30% infill.